Display screen or portion thereof with transitional graphical user interface



FIG. 1 is a front view of a display screen or portion thereof with atransitional graphical user interface showing a first image of theclaimed design;

FIG. 2 is a front view of a second image thereof;

FIG. 3 is a front view of a third image thereof;

FIG. 4 is a front view of a fourth image thereof;

FIG. 5 is a front view of a fifth image thereof; and,

FIG. 6 is a front view of a sixth image thereof.

The appearance of the animated image sequentially transitions betweenthe images shown in FIGS. 1-6 . The process or period in which one imagetransitions to another forms no part of the claimed design. In anotherembodiment, the appearance of the animated image sequentiallytransitions between the images shown in FIGS. 1 and 2 . In anotherembodiment, the appearance of the animated image sequentiallytransitions between the images shown in FIGS. 1 and 3 . In anotherembodiment, the appearance of the animated image sequentiallytransitions between the images shown in FIGS. 1 and 4 . In anotherembodiment, the appearance of the animated image sequentiallytransitions between the images shown in FIGS. 1, 5 and 6 . In anotherembodiment, the appearance of the animated image sequentiallytransitions between the images shown in FIGS. 5 and 6 .

The outermost broken lines in FIGS. 1-6 illustrate a display screen orportion thereof and form no part of the claimed design. The remainingbroken lines illustrate portions of the graphical user interface andform no part of the claimed design.

CLAIM The ornamental design for a display screen or portion thereof withtransitional graphical user interface, as shown and described.